In Nominative^x, Plural subject^x

Actually, "ye / you / your / yours" were the 2nd person plural forms (also formal) in Middle English. The singular was "thou / thee / thy /thine" The formal "you" became informal and replaced the singular. The nominative "ye" also disappeared. Now,...

I don't know exactly what you mean by "treating as a single entity". I was not treating -- at least I was not aware that I was treating -- peanut butter and jelly sandwiche s as a single entity. I think the answer you're looking for may be "Necessarily so". The fact that the predicate...